The Supreme Court has ruled that every word in the Constitution has meaning.
Natural born citizen is three words. Adding ‘natural’ requires one must be something more than a born citizen.
Of course you can change the meaning just by putting a hyphen between natural and born. Then “natural-born” can be interpreted as nothing more than born a citizen.
Unfortunately for those making that argument, there’s no hyphen between those two words in the Constitution.
But I am watching with interest how many are sticking that hyphen in there to justify their position.
Six Justices of the Supreme Court disagreed with your point of view in 1898 and for the last 117 years, their opinion has held sway:
United States v. Wong Kim Ark (1898)
[An alien parent’s] allegiance to the United States is direct and immediate, and, although but local and temporary, continuing only so long as he remains within our territory, is yet, in the words of Lord Coke in Calvin’s Case, ’strong enough to make a natural subject, for, if he hath issue here, that issue is a natural-born subject’.
“Subject’ and ‘citizen’ are, in a degree, convertible terms as applied to natives; and though the term ‘citizen’ seems to be appropriate to republican freemen, yet we are, equally with the inhabitants of all other countries, ’subjects,’ for we are equally bound by allegiance and subjection to the government and law of the land.’
“…every child born in England of alien parents was a natural-born subject, unless the child of an ambassador or other diplomatic agent of a foreign state, or of an alien enemy in hostile occupation of the place where the child was born.
The same rule was in force in all the English colonies upon this continent down to the time of the Declaration of Independence, and in the United States afterwards, and continued to prevail under the constitution as originally established.”
The Supreme Court has also said that the term "natural born citizen" is simply an adaptation to our form of government of the English term "natural born subject." And in the opinion where that is analyzed at length, the term is sometimes written "natural born citizen" and sometimes "natural-born citizen." The hyphen doesn't affect the meaning.